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Heavy trailers or bed loads can make the back end sag and throw off your steering and braking. These SumoSprings Solo Custom Helper Springs add up to 1,000 lbs of support at 50-percent compression to help your suspension stay level and steady. They cushion bumps, minimize sway, and reduce bottoming out so you keep control and comfort even when the load gets serious.
Every load feels different, and these springs adjust naturally to match. The progressive urethane design compresses easily with light loads for a softer ride, then firms up as weight increases—compressing by as much as 80 percent to carry heavier weight. That means smoother driving on small bumps and solid stability when you’re fully loaded or towing.
When a curve, crosswind, or uneven load tries to throw you off balance, each spring works on its own to keep your ride planted. This independent action helps even out weight side to side, reducing body roll and sway so handling feels sure and predictable through corners or when pulling into uneven spots.
Road salt, oil, and UV rays won’t slow these down. The microcellular urethane springs are built to handle temperatures from -25 F to 200 F while resisting abrasion and wear that can break down other materials. They compress vertically with minimal side expansion so they fit tight spaces without getting damaged.
There’s no tubing to run or air pressure to monitor—just a solid pair of jounce-style springs that bolt into place with no drilling required. Once installed, they’re completely maintenance-free, ready to provide stable suspension support trip after trip without extra adjustment or upkeep.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Wes
6/3/2024
Still. holding up like new about 15k miles later with towing and loads.
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Victoria H.
3/19/2025
Sounds like these helped get the job done well for you, Andrew! That's quite the road trip, did you get to see anything memorable along the way?